Roll-drawing machine

ABSTRACT

A roll-drawing machine adapted for an elongated material is provided. The roll-drawing machine includes at least one rolling module and a power source. The rolling module includes a mold frame, a pair of seats, and a pair of rollers. The seats are movably disposed in the mold frame. The rollers are freely pivoted in the seats respectively and move together with the seats. An end of the elongated material is connected to the power source to be drawn thereby, such that the elongated material passes between the rollers of the rolling module to rotate the rollers and be pressed by the rollers.

BACKGROUND OF THE INVENTION Field of the Invention

The invention relates to a material shaping device and more particularly relates to a roll-drawing machine.

Description of Related Art

The existing technique for processing metal elongated materials is basically to draw a metal wire of a larger diameter into one of a smaller diameter. Such elongated material is drawn to pass through a through hole mold by a strong force, such that the mold having a profile that is large on the inlet and small on the outlet can press the elongated material to shape it.

However, the size of the hole wall and the surface condition of the mold directly affect the quality of the elongated material, which imposes difficulty on maintenance and influences the service life of the mold. During the drawing process, the mold and the elongated material are in surface contact, and the friction will generate a lot of heat and affect the surface quality of the elongated material. Particularly, in the case of drawing a hard alloy wire material, it is required to adopt measures, such as lowering cross-section reduction rate of the mold, increasing the drawing force, or reducing the drawing speed, in order to prevent breaking the material during the drawing, but it will lower the efficiency. In addition, if the elongated material is profiled material with irregular cross-section, it will impose burden on the processing of the hole wall of the mold.

SUMMARY OF THE INVENTION

The invention provides a roll-drawing machine adapted for easily and efficiently rolling and pressing an elongated material.

A roll-drawing machine according to an embodiment of the invention is adapted for an elongated material for changing a size and a surface profile of the elongated material. The roll-drawing machine includes at least one rolling module and a power source. The rolling module includes a mold frame, a pair of seats, and a pair of rollers, wherein the seats are movably disposed in the mold frame, and the rollers are freely pivoted in the seats and move together with the seats. An end of the elongated material is connected to the power source and is drawn by the power source to pass between the rollers of the rolling module to drive the rollers to rotate and be rolled and pressed by the rollers.

In an embodiment of the invention, the rolling module further includes an adjustment component disposed through the mold frame and movably abutting between the pair of seats to adjust a distance between the pair of seats.

In an embodiment of the invention, the adjustment component includes an adjustment block and a locking part. The adjustment block is disposed through the mold frame to be movable along a first axis and has a pair of wedge surfaces to respectively abut the pair of seats. The locking part is disposed in the mold frame and abuts the adjustment block, wherein the locking part rotates about the first axis and moves, and drives the adjustment block to move along the first axis and drives the pair of seats to move close to or away from each other along a second axis.

In an embodiment of the invention, the pair of rollers is disposed along the second axis to respectively rotate about the first axis, and the elongated material passes between the pair of rollers along a third axis, and the first axis, the second axis, and the third axis are orthogonal to one another.

In an embodiment of the invention, the rolling module further includes a plurality of bearings respectively disposed between the pair of rollers and the pair of seats.

In an embodiment of the invention, the roll-drawing machine further includes a plurality of elastic members respectively abutting between the pair of seats and the mold frame, wherein a deformation direction of each of the elastic members is consistent with a movement direction of each of the pair of seats.

In an embodiment of the invention, the roll-drawing machine includes a base and a plurality of the rolling modules, wherein the rolling modules are stacked on one another and disposed upright in series on the base, and the elongated material is drawn by the power source to pass between the pair of rollers of each of the rolling modules.

In an embodiment of the invention, on a plurality of normal planes formed by a drawing axis of the elongated material, the rollers of the rolling modules respectively roll and press the elongated material in different axial directions.

Based on the above, in the roll-drawing machine, an end of the elongated material is connected to the power source, so as to provide the power for moving (drawing) the elongated material, and at least one rolling module is provided and the elongated material passes between a pair of rollers of the rolling module. Since the rollers are freely pivoted in the seats of the rolling module, as the elongated material is drawn by the power source, the elongated material drives the rollers to rotate and, at the same time, the elongated material is held between the rollers to be rolled and pressed. Thus, adverse effects caused by the existing drawing technique may be prevented. In other words, since the rollers of the rolling module and the elongated material are in a rolling friction state, the possibility of damaging the drawing mold may be significantly reduced and thus the service life is improved. In addition, when dealing with an elongated material that is hard to shape (e.g., a harder material), since the contact area between the rollers and the elongated material is much smaller as compared with the existing drawing mold, it has a larger degree of deformation (i.e., a larger area reduction rate) and thus reduces the number of times of processing the elongated material, and may also be adapted for materials having various irregular cross-sections.

To make the aforementioned and other features and advantages of the invention more comprehensible, several embodiments accompanied with drawings are described in detail as follows.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the invention and, together with the description, serve to explain the principles of the invention.

FIG. 1 is a schematic view of a roll-drawing machine according to an embodiment of the invention.

FIG. 2 is a schematic exploded view of a rolling module.

FIG. 3 is a schematic cross-sectional view of the rolling module.

FIG. 4 is a schematic view of assembly of the rolling module of FIG. 1.

FIG. 5 is a simplified schematic view of the rolling module of FIG. 4.

DESCRIPTION OF THE EMBODIMENTS

FIG. 1 is a schematic view of a roll-drawing machine according to an embodiment of the invention. FIG. 2 is a schematic exploded view of a rolling module. Moreover, Cartesian coordinates X-Y-Z are provided to facilitate description of the related components. Referring to FIG. 1 and FIG. 2, in this embodiment, a roll-drawing machine 10 is adapted for performing a rolling process on an elongated material 20A, so as to change the size and surface profile of the elongated material 20A. As shown in FIG. 1, the elongated material 20A that has a larger diameter is rolled and shaped into an elongated material 20B that has a smaller diameter. The roll-drawing machine 10 includes a base 300, at least one rolling module, and a power source 200. The rolling module is assembled onto the base 300, and an end of the elongated material 20A, 20B is connected to the power source 200 to be driven to move along a Z axis and then pass through the rolling module, so as to complete the rolling process required. Here, two rolling modules 100A and 100B are illustrated as an example, but the invention is not limited thereto.

Referring to FIG. 2, in this embodiment, the rolling module 100A includes a mold frame 110, a seat component 120, a roller component 130, an adjustment component 140, a locking component 150, and an elastic component 160 (the rolling module 100B is composed of the same components), wherein the mold frame 110 includes members 111, 112, 113, and 114 which form a closed structure respectively with locking parts 151, 154, 155, and 158 of the locking component 150. The seat component 120 includes a pair of seats 121 and 122 that are disposed in the mold frame 110 to be movable along a Y axis. The roller component 130 includes a pair of rollers 131 and 134 and a plurality of bearings 132, 133, 135, and 136. The rollers 131 and 134 are freely pivoted in the corresponding seats 121 and 122 respectively via the bearings 132, 133, 135, and 136. Here, “freely pivoted” means that the rollers 131 and 134 are not connected to any external power source. In other words, the rollers 131 and 134 are to be passively rotated.

In the beginning, a cross-sectional diameter of an end of the elongated material 20A is changed via a mechanical process to be less than a gap of the rollers 131 and 134, such that the end of the elongated material 20A passes though the rollers 131 and 134 to be connected to the power source 200. Accordingly, when the user puts the elongated material 20A connected to the power source 200 (along the Z axis) between the rollers 131 and 134 of the rolling module 100A, as the elongated material 20A is in contact with and is rolled between the rollers 131 and 134, the elongated material 20A drives the rollers 131 and 134 to rotate about the X axis, and meanwhile, the elongated material 20A is rolled and shaped by the pressure of the rollers 131 and 134 along the Y axis, such that the elongated material 20B that has been rolled and pressed is moved out of the rolling module 100A.

FIG. 3 is a schematic cross-sectional view of the rolling module. Referring to FIG. 2 and FIG. 3, in this embodiment, the adjustment component 140 is disposed through the mold frame 110 and movably abuts between the seats 121 and 122 for adjusting a distance between the seats 121 and 122. Specifically, the adjustment component 140 includes adjustment blocks 141 and 143 and locking parts 142 and 144. The adjustment blocks 141 and 143 are disposed through the members 114 and 113 of the mold frame 110 to be movable along the X axis. The adjustment blocks 141 and 143 each have a pair of wedge surfaces 141 a, 141 b, 143 a, and 143 b to respectively abut wedge surfaces 121 a, 121 b, 122 a, and 122 b of the seats 121 and 122, wherein the wedge surfaces 141 a, 141 b, 143 a, 143 b, 121 a, 121 b, 122 a, and 122 b are all inclined with respect to a movement axial direction of the adjustment blocks 141 and 143 and the seats 121 and 122 and correspond to each other. Thereby, the movement pattern of the adjustment blocks 141 and 143 along the X axis may be smoothly converted into the movement pattern of the seats 121 and 122 along the Y axis. In addition, the locking parts 142 and 144 are disposed in the members 114 and 113 of the mold frame 110 and abut on the adjustment blocks 141 and 143, as shown in FIG. 2, and the members 114 and 113 have holes 114 a and 113 a for the adjustment blocks 141 and 143 to move therein. Moreover, the holes 114 a and 113 a are formed with threads on the inner side to correspond to the threads on the locking parts 142 and 144 (threads of the holes 113 a is shielded because of viewing angle in FIG. 2). Accordingly, the user may drive the locking parts 142 and 144 to rotate about the X axis to move along the X axis and further to drive the adjustment blocks 141 and 143 to move along the X axis.

In addition, the elastic component 160 includes a plurality of elastic members 161, 162, 163, and 164, which respectively abut between the seats 121 and 122 and the members 111 and 112 of the mold frame 110, and a deformation axial direction of each of the elastic members 161, 162, 163, and 164 is consistent with the movement axial direction of the seats 121 and 122. Specifically, when the locking parts 152, 153, 156, and 157 are respectively locked into the members 111 and 112 of the mold frame 110, the locking parts 152, 153, 156, and 157 pass through the seats 121 and 122 to provide a guidance function along the Y axis, and the elastic members 161, 162, 163, and 164 are respectively disposed on the locking parts 152, 153, 156, and 157, such that, for the seats 121 and 122, the combination of the locking parts 152, 153, 156, and 157 and the elastic members 161, 162, 163, and 164 keeps the seats 121 and 122 in a floating state that the seats 121 and 122 are movable along the Y axis.

Based on the above, the seats 121 and 122 are guided by the locking parts 152, 153, 156, and 157 in the Y axis and abut on the elastic members 161, 162, 163, and 164 in the floating state, and meanwhile structurally abut the adjustment blocks 141 and 143 in the X axis. Accordingly, the user may smoothly drive the seats 121 and 122 close to or away from each other by adjusting the positions of the adjustment blocks 141 and 142 in the mold frame 110, so as to adjust a gap G1 (shown in FIG. 3) between the rollers 131 and 134. Thus, unlike the existing drawing mold that has a fixed hole wall size, the rolling modules 100A and 100B of this embodiment may be adapted for elongated materials 20A with different cross-sectional sizes, and therefore the applicability of the rolling modules 100A and 100B is improved.

FIG. 4 is a schematic view of assembly of the rolling module of FIG. 1. FIG. 5 is a simplified schematic view of the rolling module of FIG. 4. Referring to FIG. 1, FIG. 4, and FIG. 5, in this embodiment, the two rolling modules 100A and 100B disposed on the base 300 are stacked along the Z axis and disposed upright in series. Referring to the four axes Z1, Z2, Z3, and Z4 as shown, the distances between adjacent two axes are equal to each other. In other words, the four axes Z1, Z2, Z3, and Z4 form a square profile on the X-Y plane. Thus, on a plurality of normal planes (parallel to the X-Y plane) formed by a drawing axis (Z axis) of the elongated materials 20A and 20B, the rollers in the rolling modules 100A and 100B roll and press the elongated material 20A from different axial directions. As shown in FIG. 4 and FIG. 5, when the rollers disposed in the rolling module 100A are taken as the reference (0 degree), the rollers in the rolling module 100B are rotated 90 degrees (i.e., rotated 90 degrees with respect to the Z axis). Thus, as shown in FIG. 5, when the elongated material 20A having a circular cross-section A1 enters the rolling modules, the elongated material 20A is first pressed by one group of rollers into an elongated material 20C having an elliptical cross-section A2, which is not a circular cross-section yet, and therefore the elongated material 20C is then pressed by the other group of rollers in a different axial direction, such that the elongated material 20B that comes out of the two rolling modules has a circular cross-section A3, and the circular cross-section A3 is smaller than the circular cross-section A1. If the object to be processed is a carbon steel elongated material, the area reduction rate of the circular cross-section A3 compared with the circular cross-section A1 may be up to 50% or more.

Since the mold frame 110 of this embodiment has a substantially square profile, the relative rotation angles of the rollers of different rolling modules are 90 degrees. Moreover, in an embodiment not shown here, the mold frame may be replaced by a turntable structure that is rotatable about the Z axis, such that the rollers of different rolling modules are capable of rolling and pressing the elongated material in any axial direction.

It should also be noted that the above description of this embodiment should not be construed as a limitation to the size and (cross-sectional) profile of the elongated material. The profile may be changed by properly adjusting the corresponding profiles of the rollers, and thus the roll-drawing machine is suitable for processing elongated materials with various irregular profiles. As to the size, since the gap G1 between the rollers is adjustable, any elongated object, such as wires, bars, and rods may be processed by the roll-drawing machine 10 of this embodiment.

To sum up, regarding the roll-drawing machine according to the above embodiment of the invention, an end of the elongated material is connected to the power source, so as to provide the power for moving the elongated material, and at least one rolling module is provided and the elongated material passes between a pair of rollers of the rolling module. Since the rollers are freely pivoted in the seats of the rolling module, as the elongated material is drawn by the power source, the elongated material drives the rollers to rotate and, at the same time, the elongated material is held between the rollers to be rolled and pressed. Thus, adverse effects caused by the existing drawing technique may be prevented. In other words, since the rollers of the rolling module and the elongated material are in a rolling friction state, the possibility of damaging the drawing mold may be significantly reduced and thus the service life is improved. In addition, when dealing with an elongated material that is hard to shape (e.g., a harder material), since the contact area between the rollers and the elongated material is much smaller as compared with the existing drawing mold, it has a larger degree of deformation (i.e., a larger area reduction rate) and thus reduces the number of times of processing the elongated material, and may also be adapted for materials having various irregular cross-sections, e.g., welding rods for welding or track strips having irregular cross-sections required for linear slides.

It will be apparent to those skilled in the art that various modifications and variations can be made to the disclosed embodiments without departing from the scope or spirit of the invention. In view of the foregoing, it is intended that the invention covers modifications and variations provided that they fall within the scope of the following claims and their equivalents. 

What is claimed is:
 1. A roll-drawing machine adapted for an elongated material to change a size and a surface profile of the elongated material, the roll-drawing machine comprising: at least a rolling module, comprising: a mold frame; a pair of seats movably disposed in the mold frame; a pair of rollers freely pivoted in the pair of seats to move together with the pair of seats; and a power source, wherein an end of the elongated material is connected to the power source and drawn by the power source to pass between the pair of rollers of the at least one rolling module to drive the pair of rollers to rotate and be rolled and pressed by the pair of rollers.
 2. The roll-drawing machine according to claim 1, wherein the rolling module further comprises: an adjustment component disposed through the mold frame and movably abutting between the pair of seats to adjust a distance between the pair of seats.
 3. The roll-drawing machine according to claim 2, wherein the adjustment component comprises: an adjustment block disposed through the mold frame to be movable along a first axis and having a pair of wedge surfaces to respectively abut the pair of seats; and a locking part disposed in the mold frame and abutting the adjustment block, wherein the locking part rotates about the first axis and moves, and drives the adjustment block to move along the first axis and drives the pair of seats to move close to or away from each other along a second axis.
 4. The roll-drawing machine according to claim 3, wherein the pair of rollers is disposed along the second axis to respectively rotate about the first axis, and the elongated material passes between the pair of rollers along a third axis, and the first axis, the second axis, and the third axis are orthogonal to one another.
 5. The roll-drawing machine according to claim 1, wherein the rolling module further comprises a plurality of bearings respectively disposed between the pair of rollers and the pair of seats.
 6. The roll-drawing machine according to claim 1, further comprising a plurality of elastic members respectively abutting between the pair of seats and the mold frame, wherein a deformation direction of each of the elastic members is consistent with a movement direction of each of the pair of seats.
 7. The roll-drawing machine according to claim 1, comprising a base and a plurality of the rolling modules, wherein the rolling modules are stacked on one another and disposed upright in series on the base, and the elongated material is drawn by the power source to pass between the pair of rollers of each of the rolling modules.
 8. The roll-drawing machine according to claim 7, wherein on a plurality of normal planes formed by a drawing axis of the elongated material, the rollers of the rolling modules respectively roll and press the elongated material in different axial directions. 